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目的探讨腰椎骨髓脂肪与腹部脂肪的相关性。方法共68人(男32人,女36人,年龄21~74岁,中位年龄49.5岁)纳入前瞻性研究。1.5T MR采用单体素点分辨波谱法(PRESS)对L3椎体进行波谱采集,计算脂肪比(FF%);同时行腰椎64排CT检查,用定量CT(QCT)分析软件测量L3相应层面腹部皮下脂肪(SAT)与内脏脂肪(VAT)。男、女按年龄各分为两组(≥50岁和<50岁),用SPSS 19.0软件进行统计学分析。结果男性BMI、FF%、VAT及SAT≥50岁组和<50岁组比较均无显著性差异(P>0.05),FF%与BMI、VAT及SAT均无明显相关性(r分别为-0.109、0.034、-0.066,P>0.05)。女性BMI、FF%、VAT及SAT≥50岁组和<50岁组比较均有显著性差异(P<0.05);女性≥50岁组,FF%与VAT呈明显正相关(r为0.499,P<0.05),FF%与SAT无明显相关性(r为0.221,P>0.05);女性<50岁组,FF%与VAT或SAT均无明显相关性(r分别为-0.076、-0.067,P>0.05)。结论中老年女性(≥50岁)腰椎骨髓脂肪含量与VAT关系密切,男性与年轻女性(<50岁女性)腰椎骨髓脂肪含量与腹部脂肪无关。
Objective To investigate the correlation between lumbar bone marrow fat and abdominal fat. Methods A total of 68 patients (32 males and 36 females, aged 21-74 years and median age 49.5 years) were included in the prospective study. 1.5T MR was used to collect the L3 vertebral body by single element point-resolved spectroscopy (PRESS), and the fat percentage (FF%) was calculated. At the same time, 64-slice CT examination of lumbar spine was performed. Abdominal subcutaneous fat (SAT) and visceral fat (VAT). Men and women were divided into two groups according to their age (≥50 years old and <50 years old), and were analyzed by SPSS 19.0 software. Results There was no significant difference in BMI, FF%, VAT and SAT≥50 years old group and <50 years old group (P> 0.05), FF% had no significant correlation with BMI, VAT and SAT (r = -0.109 , 0.034, -0.066, P> 0.05). There was a significant difference (P <0.05) between women with BMI, FF%, VAT and SAT≥50 and <50 years old, and with a positive correlation between FF% and VAT (r = 0.499, P (R = 0.221, P> 0.05). There was no significant correlation between FF% and VAT or SAT in women <50 years old (r = -0.076, -0.067, P > 0.05). Conclusion The bone marrow fat content in lumbar spine of middle-aged and elderly women (≥50 years old) is closely related to VAT. The lumbar marrow fat content of male and young women (<50 years old women) is not related to abdominal fat.